text message

SIM-based SMS

Real SIM cards deliver your content straight to the handset, with no template framework shaping the format — for promotions where ordinary channels restrict too much and the message still has to land as written.

FEATURES

Write it your way, across every carrier range

The restrictions ordinary channels place on copy tend to cost you conversions. SIM-based sending keeps the message intact while covering the number ranges of China Mobile, Unicom and Telecom.

Promotion that can be replied to

Restricted topics and ordinary industries alike reach their audience through SIM-based sending. Replies land in a conversation, and nothing is charged for them.

Templates ready to use

Proven templates for every industry in three shapes — link-only, short script and standard length — usable as they are or adjusted to fit.

Every carrier range

All China Mobile, Telecom and Unicom ranges can be reached, with no need to split your list by carrier and no pace but the one you set.

Product

SIM-based sending from several facilities

Covering China Mobile, Unicom and Telecom, with SIM-based delivery to the 13x/15x/16x/17x/18x ranges.

Just a link

Recommended domain suffixes: cn / tw / uk / org / us / in / pro / vip / de / pw

Short copy plus a link

A brief line with a short link, suited to campaigns and win-back. Ask support for copy used in your industry.

Short copy plus a contact

A WeChat ID, phone number or support handle in the body so recipients can reach you directly; the copy adapts to the industry.

Pricing

What SIM-based sending costs

SIM-based sending is not quoted separately: the rate depends only on the destination country or region of the receiving number, never on the route. All 242 destination rates are published, there is no monthly or API fee, and failed submissions are not billed — the credit is returned in real time.

SMS PRODUCTS

Four routes for four kinds of traffic

Pick a route by content type and target region; one-time passwords, notifications and marketing all share the same console.

China 106 SMS

Domestic standard 106 SMS

Direct routes into China Mobile, Unicom and Telecom for one-time passwords, order notifications and marketing alike, submitted from the console or triggered over the API.

International SMS

International standard SMS

Covering 242 countries and regions from one API, with multilingual content and scheduling in the recipient's time zone.

Regulated categories

Five types of channel SMS

Dedicated routes for credit, crowdfunding, securities, insurance and property messaging, running domestic and international paths in parallel.

SIM-based SMS

The machine room SIM SMS

Sent from physical SIM cards across the 13x-18x ranges of all three carriers, with no template framework constraining the content.

FAQs

About SIM-based sending

How the route behaves, two-way replies, and which number ranges are covered.

The 106 route sends under a fixed signature: tidier in format and steady on arrival. SIM-based sending goes out from a real number, so the content is freer and reads like an ordinary text message. Neither requires pre-approval or advance filing.

RedsmsBox

Modern infrastructure, proven routes
RedsmsBox moves your SMS, wherever it needs to go